“Optimize” or “Optimise”

Language

Optimize and optimise are both English terms.

Usage

Optimize is predominantly used in 🇺🇸 American (US) English (en-US) while optimise is predominantly used in 🇬🇧 British English (used in UK/AU/NZ) (en-GB).

In terms of actual appearance and usage, here's a breakdown by country, with usage level out of 100 (if available):

Term	US	UK	India	Philippines	Canada	Australia	Liberia	Ireland	New Zealand	Jamaica	Trinidad & Tobago	Guyana
optimize	98	44	75	96	95	41	0	49	49	100	100	0
optimise	2	56	25	4	5	59	0	51	51	0	0	0

• In the United States, there is a preference for "optimize" over "optimise" (98 to 2).
• In the United Kingdom, there is a 56 to 44 preference for "optimise" over "optimize".
• In India, there is a preference for "optimize" over "optimise" (75 to 25).
• In the Philippines, there is a preference for "optimize" over "optimise" (96 to 4).
• In Canada, there is a preference for "optimize" over "optimise" (95 to 5).
• In Australia, there is a 59 to 41 preference for "optimise" over "optimize".
• In Liberia, there is not enough data to determine a preference between "optimize" and "optimise".
• In Ireland, there is a 51 to 49 preference for "optimise" over "optimize".
• In New Zealand, there is a 51 to 49 preference for "optimise" over "optimize".
• In Jamaica, there is a preference for "optimize" over "optimise" (100 to 0).
• In Trinidad & Tobago, there is a preference for "optimize" over "optimise" (100 to 0).
• In Guyana, there is not enough data to determine a preference between "optimize" and "optimise".

Examples

Below, we provide some examples of when to use optimize or optimise with sample sentences.

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